Oct 14, 2016 based on my project requirements, i need to parse the json string into a cobol copybook and do the functional processing on them. Creating an api from a cics application mainframe dev. Json files this bridge imports metadata from json files using the java api. But i have no clue how to use this in the cobol program. This solution may consist of a midtier function that proxies the rest request to the backend. A copybook is a member containing either cobol data descriptions, pli declare statements, or hlasm data definitions. If the cobol was changed to s96v99 sign leading it would be a lot easier to handle in java. Amending the layout would be easy enough, but youdd need to know to do it. Cobol data structures copybooks and c variables header files from json. Fixed width data to json transformation using copybook. Copy statement is used in the workingstorage section. As a result, if you provide structured hierarchical data to third parties as opposed to. Cobol copybook to xml converter cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sable. I have tried to convert a copybook into json format in cobol but was unable to do as the zos version 4.
We use the copy statement to include a copybook in a program. Its actually a lot of work to build a parser that handles all of this. In the old days it was a pointtopoint solution, meaning that both applications needed to be adapted to have data exchange between them. It is derived from the javascript scripting language for representing simple data structures and. The dfhjs2ls utility program supports mappings between json schema and cobol data structures. The cics assistants generate unique, valid field names for cobol variables from the schema element names by using the following rules.
In addition, this redbooks publication provides a broad understanding of the new cics architecture that enables you to make new and existing mainframe applications available as web services using javascript object notation json, and provides support for the transformation between json and application data. Cobol copybooks can be used to format cobol data files. Need help in using hwtjpars in cobol for parsing json data. A json schema specifies that a variable is optional if it does not appear in the required keyword array that is associated with the enclosing json schema object type. These changes make it easier to bring large and complex mainframe files into a data lake for further processing and analytics. The file is not suitable for conversion to csv unless you only want the header records. This bridge extracts the metadata json hierarchical structure and detects the following standard json data. Parsing a cobol data file against a cobol copybook tibco. Code issues 34 pull requests 0 actions projects 0 wiki security insights.
Make one pass over the copybook stream, do not generate the intermediate cb2java data objects but write json directly to the output stream using. Sourceforge this saved me weeks of hard work on copybook parsing and interpreting. Before a cobol application generates or parses json, a cobol record definition crd is coded, consisting of a working storage field definition for each json object the schema to copybook build tool can be used to create this. However, copybook templates allow you to define a number of different formats for use with data sets that contain multiple record types. Source definition the source definition describes the copybook members, their corresponding data sets, and how the field definitions are to be arranged in a template. For example, two instances of year become year and year1. Transforming fixed width data to json format using cobol copybook schema. Implementing ibm cics json web services for mobile applications. This is the ids program data fields used as the api to the json writer. But due to my copybook using redefine clause i am unable to get the required format. Such a tool has to be prepared to handle the complexities found in real copybooks, such as field declarations, pic strings, redefines, 77 and 88. Characters other than az, az, 09, or hyphen are replaced with x. This project includes utilities to convert an xml instance file into its cobol copybook equivalent string buffer and vice versa. A cobol code to parse a json string 3 commits 1 branch 0 packages 0 releases fetching contributors cobol.
With the latest ibm enterprise cobol v6 compiler, you can generate and parse json documents directly from cobol. Also the recordeditor will let you view edit mainframe cobol files. Json request response files this is the json version of the language structures, one for input and one for output wsbind file this is the file that cics will use at runtime to marshal the inbound request to a binary language structure and the response back to json. Anyone have a cobol converter easy to understand copy book sitting around. Contribute to askadiancoboljsonparser development by creating an account on github. If the last character is a hyphen, it is replaced with x.
Oct 18, 2016 for example, bringing the rest call directly into a cics region configured with json web services. Json thunder parse, create, validate json for cobol. Cb2java has not been updated in a while not supported any more and has problems. If you try to hack it with regexes or something else that cant do something like contextfree parsing, your resulting tool will simply not work on any complex cases. This library converts a fixedwidth data stream into its json equivalent using a copybook to define both structures. The dfhls2js utility program supports mappings between cobol data structures and json schema definitions.
A copybook may be included in more than one cobol program, and a program may include more than one copybook. With cobol lsps latest release, you can define the copybook library in settings. The scope of a conditional json generate statement can be terminated by either an end json phrase or a separator period. The json web services assistant maps cobol data description elements to schema elements according to the following table. Conference in the cloud a perl and raku conf 5,200 views.
Strings of contiguous hyphens are replaced by contiguous underscores. Implementing ibm cics json web services for mobile. I am using a read file activity and pass the text to the cobol parser, where some of the special characters are getting transformed to, what i believe is a junk value. Using the example chapter 11 in redbook implementing ibm cics json web services for mobile applications. Just wondering what happens if a field in the copybook is defined as compcomp4binary but the program writing the record was compiled with truncbin, so effectively those usages become comp5. If you want to read mainframe cobol files in java, have a look at. Cobol copybook to xml converter cb2xml copybook to xml is a cobol copybook to xml converter. This requires intuitive, standardsbased and define the api to a zos asset.
Mainframe file formats, both text and binary files. For parsing this json data which is in textpad now, and we can ftp to mf, we do have the required modules hwtjparshwtjinit in our library. Calling a restful api from a cics application mainframe dev. Cobol85 compliant code for validating, parsing and creating xml and json messages. Identifier1 must be large enough to contain the generated json text. The legstar transformers are pure java and can be used directly in your code. A generic cobol parser and cobol data source for apache spark. Introduction this article describes how to call a remote api from a zos application. The bind file provides zos with knowledge of how the json maps to the target data structure copybook and a json schema, which are used to map. Parse cobol copybook files into json using python more info. Use of end json allows a conditional json generate statement that is, a json generate statement that specifies the on exception or not on exception phrase to be nested in another conditional statement. In addition, this redbooks publication provides a broad understanding of the new cics architecture that enables you to make new and existing mainframe applications available as web services using javascript object notation json, and provides support for the transformation between json. Below is an example copybook file before and after being processed. Jul 23, 2010 json to cobol it turns out it is fairly simple to transform json strings to cobol using legstar and jackson.
If you dont have an existing application, thunder also provides a sample main or calling program that can serve as the. I need to convert the rows and columns fetched from select into json format. And it is originated from cobol on ibm mainframe operating systems. For detailed information on xml syntax extensions, see the topic xml syntax extensions. Hello everyone, i have tried to convert a copybook into json format in cobol but was unable to do as the zos version. Duplicate names are made unique by the addition of one or more numeric digits. The copybook contains examples of various numeric data types cobrix supports. If you can get the cobol copybook, why not use one of the cobol java packages. Nov 16, 2017 with the latest ibm enterprise cobol v6 compiler, you can generate and parse json documents directly from cobol. To process, you really need the cobol copybook or pl1 etc depending on the language used. Process in cobol whatever on the mainframe as400 where ever it comes from. Generated cobol and c code for validating, parsing and creating xml and json is tuned to zos for optimum performance. Copybook to json conversion 5 commits 1 branch 0 packages 0 releases fetching contributors view license java. Each special character is being transformed to a 4 digit value after.
Convert mainframe ebcdic files to pc format textpipe pro. This bridge loads the entire json file using a streaming parser, therefore there are no size limits, although it may take time if it is a remote large json file. Json is a textbased open standard designed for humanreadable data interchange. Json request response files this is the json version of the language structures, one for input and one for output. Fixed width data to json transformation using copybook lets take a quick look at the fixed width data to json transformation using copybook. Neither the test harness, nor the json writer use the copybook.
Copybooks often contain the name and data types of variables that associated cobol programs, such as cics commarea, use to exchange information. It stands for application programmable interface and exists as long as two applications wanted to communicate with each other. I am trying to parse a cobol data file against a cobol copybook using cobol copybook plugin. Cb2xml copybook to xml is a cobol copybook to xml converter written in java and based on the sablecc parser generator. The redvers cobol json interface operates at record level, intelligently building. To do this you would start from a cobol fragment and use the usual legstar cobol to xsd translator and then generate transformers using legstar cobol binding generator. When you import a cobol copybook, the default representation is now cobol.
Hi all, based on my project requirements, i need to parse the json string into a cobol copybook and do the functional processing on them. Transforming fixed width data to json format using cobol. At runtime, mainframe data containing ebcdic, comp, etc. File manager has extended its service provider for zos connect feature to support access to mainframe data via rest apis using two access methods. Depending the origin of the copybook, you may have to process the text as ebcdic.
In a copybook template, the field definitions start position, length and type are not editable. Then use the json parser on zos to parse it an get the structure. We use the cics catalog manager example application and enhance it with a call to a remote api. Sql server seems to have for json to perform this operation. A cobol copybook is a selection of code that defines data structures. The service definition or sar file contains a bind file and a json schema document. On mainframe, we read the message in a cobol program an elaborate this further. Kostenloses tool, um aus einem schema ein copybook einfach erstellen zu konnen.
Wsbind file this is the file that cics will use at runtime to marshal the inbound request to a binary language structure and the response back to json. If a particular data structure is used in many programs, then instead of writing the same data structure again, we can use copybooks. Mar 04, 2019 download cobol copybook to xml converter for free. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. Convert the pojo tree to json using jacksons objectmapper. New data masking features in talend data mapper allow the masking of fields in hierarchical data such as json.
The generated json text is encoded in utf16 bigendian codepage 1200 if identifier1 is of category national. Introducing rest apis for mainframes mainframe dev. Learn more how to parse data to and from cobol s96v99 format in java. The crd is then placed in the standard copybook library and a copyinclude statement is added to the application code. Typically, it should be from 2 to 3 times the size of identifier2, depending on the lengths of the datanames.
Recordeditor ideally with a cobol copybook jrecord, coboltoxml or some other programproject that can process ebcdic cobol. It is basically a mainframe ispf edit style hex view. This is the most direct approach, but it means that a different solution is required for each type of mainframe application. Typically, programs that exchange data in this way are compiled with the same copybook file. Records can be identified by type within a data set and each type can be associated with a different format. To xmlenable your program, you need to either rename recordcbl2xml. Cobol data description elements that are not shown in the table are not supported by json web services assistant. This is ideal for fixed width text or binary files, cobol data files, mainframe files and complicated csv files. It can parse cobol copybooks to change them into an xml file describing perfectly all picture with a lot of useful attributes, like length or type.
The editor uses a recordlayout description to format the files. Legstar overview mainframe integration services by legsem. From the filters to apply tab, add a filter library\ mainframe \ mainframe copybook master record, and set the general options such as the output format csv, tab, pipe, xml. The json web services assistant with parameters mappingmodels2js and langcobol will map between cobol data structures and.
Data description items with level numbers of 66 and 77 are not supported. It is a fixed record length raw data file with a corresponding copybook. It will generate cobol code to validate and parse json messages into cobol. So we thought to change the structure of the message and put the message in json format on mq. Cobol names are converted to json names according to the following rules. We do not discuss security in this article but refer to the next article. Sparkcodecapp is an example usage of a custom record header parser. If you dont have an existing application, thunder also provides a sample main. We are trying to implement json in cics from cobol but keep getting some weird things going on. If you use a cobol parser designed for the purpose, then this is relatively easy. Json support in ibm enterprise cobol for zos youtube. File system csv, pos, excel, xml, json, avro, parquet. The json parser portion of the zos client web enablement toolkit provides a generic, native zos javascript object notation json parser for zos applications.